| 摘要 |
<p>A laser cutting apparatus (10) whereby the laser beam (11) is directed onto a cutting portion (13) of the workpiece (15), and a jet (18) of gas is guided, fully enclosed within solid walls, onto the cutting portion (13, 13a) in an inclined direction in relation to the beam (11) and at such a velocity as to control the fluid-thermodynamic effects caused by interaction with the beam (11) and with the material liquefied by the same, and to flush the liquefied material out of the cut (16) in steady, controlled manner. The jet (18) is supplied by means of a solid-walled conduit (21), the end portion of which conveniently presents an opening (37) enabling passage of the beam (11) onto the cutting portion (13, 13a).</p> |
